Notching-machine.



E0 XODEL.

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" M. VON PRIN'.

NOTCHING MACHINE.

Mttle You Pein v @Hominid- PATgNTnn ma. 9, 19.0;

Patented Auping, 1904. I

UNITED STniAE-SMMBATENT OFFICE.

.\i.\'r'riir.\i vox Paix, 'or iiitmioxn iNDiANA.

NOTCHlNGrNlACHlNE.

SPECIFICATIN forming par?. of Lettera Patent No. 768,896, dnted `August 9, 1.904.

Witwen ne me i4. met. aunts. 197,977. on man.)

Tn m'/ n'mm it may rnueern.:

citizen ofthe United Statue. residing :it Richniond, in the county of Wayne und State. of lndiiinn, hiive invented certain new und useful liiiprorenients in Xiteliin,rhlncllinc's` of which the following* is nvspeeiiicntion.

li-i the iniinut'iict'iire of piiino` ithns heretotween cutter 24 sind yoke. 1T. is a suitable fore been customary to secure the bridge to the lonndin,i 'ho:ird iind therenfter cut outihy lnind portions iiloni;r the edges of the bridge, sone to forni uniform :ind comparatively nurrow supportinir-ledges for the several sets ol' string, :i ledge heini: formed for enirh set of Strinirs--tliiit is. the strings designed to prodnee n singe tone. Such work is exceolinjrly slow und tedious und requires con idti-ahle skill.

The object of my present invention is to provide n machine by means of which this work upon the bridge nifty he more rapidly und uniformly done.

The accompanying drawings illust'mte my invention.

Figure 1 is n perspective vieweliowing my improved tool in operation. Fig. .2 is :i phin thereof with n portion of the bridge: Fig. 3. nn elcviitio'n with the bridge in Section: Fig. 4, n phin of the supporting-joints; Fig. 5. :i section on line 5 of Fig. 4, sind Fig. 6 ai section on line 6 6 of Fig.

ln the drawings, 1() indicates the soundingbonid of a pianoforte, und l1 the bridge secured thereto. This bridge. as heretofore stated, requires the formation in its top of n Series of ledges 1Q, over which the stringsof the pianoforte are stretched. :ind these ledges are formed by producing notches or depressions 1? in the opper face o't' the bridge. the sides of the ledges beingut 'right :ingles'to the strings. while the main lines of the bridge curve im desired to produce the necessary relative length of `string?.

My improved tool consists of a'suitable supporting-base l5, having a smooth bottom in order that it may Slideeasily over the sounding-board 10. Irected from bitec 15 are a pair of ears 16, between which is pivoted a yoke 17, said yoke beingeupported ii pon a central horizontal shaft 18, mounted in ears l lt'. Pivoted iipon horizontiil pins 19 in yoke 1T :it right iin'eles to shaft i8 is the bifnrcated end 20 ofv u tool-carrying: handle or arm 21. J-ourniiled in suitable bearings on htindie 2l is ii `Qliiil't 22. parallel with the pins 19', und

this shiiiteiirries nti one end n suitable pulleyy 23 und nt. the other end n. cutter 24.

Mounted upon hund-le 21. preferably he- Vmotor 25. (preferably iin electric motor.) provided with ii pulley 26 in line with pulley Q3 :ind connected thereto ly nsuitable belt 2.

ing provided, if desired. to prevent too much swiner iibontthe shiift. The hiindle 2l is provided :it ii point convenient to the operator with n suitable adjusting-screw 28, by means l of which the depth of the cut of the ciittert muy be easily determined. For convenience of operation the entier :24 is preferably arranged in line with shaft 18.

ln operation after the brit-.ige l1 issecured in position the tool described is run np ndjvf cent. the bridge` und the operator grasping tli'e tool in the ninnner "howi'i in Fig. l, one

linnd upon n htindlc 21 und the other upon a, -siipport 2S), iii-ing` the cutter 24 into engagement with the iipper face of the bridge in such manner :is to cnt the desired notches therein.

ltwill he immediately understood froifri the y illustration that by the, means described the necessary notches may be 'outin the bridge j very riipidly and very iinifori1ily,and expe'- rienee hns shown that an operator compa-rn tively unkilleii can produce a very much greater qniintity of work and ofa more uni-' form qinilitythan has heretofore been possible by hand.

By rcfmon of the universal joint between the handle .20 and-the Supporting-block 15 any desired angle of cut may be obtaincyet the' cutter and motor are always in alinementb I eliiim as my invention- 1. A tool of the class described consisting of, a suitable portable 'horizontal supportingplate, an arm jointed thereto by means of a joint hinged in two Dia-nee, a motor mounted un mid arm. u cutur juin-unical on said arm; :.nd cunmwftimb Iwu'vwn thv umlpr :md cxx-b E ti'x, fur the purgmse set forth. A 2. um! of the vhs dcscriiml eoxiiing uf. :i suimble pOrt-nhivhorixunmi snpporling 2 puh. :in uxjm jointed therein hy means of :a .nim hingwl in (wo phmefgn @utter jemrmivd m said arm in iiue with une of Lheuxcs uf thv jnim, n motor also mountcdon thv arm. and connections bouwen the motor and futter.

2. A tool of the l:u\-"iiescx'iml consisting' i 0L a suixnhlu por'mblc horizontal supporting? joint permitting mm'vmvnl in two plu-nes. a cumr jm'irnaic! un said arm, nm! :mans for 15 operating the cutter.

In wtmiQ wiwi-vof l haw hocuni'n sift my hund :ind seal, nl lichnmnd, Indiamnthis 10m day of Mardi. A. D, 1904. A MATT. VOX PRIN. [L Witncsqes:

plate, an arm joint-vd thereto by :www of n 

